<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card style="heigh">
      <!--提示区域-->
      <el-alert title="添加商品信息" center show-icon :closable="false" type="info"></el-alert>

      <!--步骤条区域-->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!--form-->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!--tab区域-->
        <el-tabs
          v-model="activeIndex"
          tabPosition="left"
          :before-leave="beforeTabLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" neme="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!--级联选择器-->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" neme="1">
            <!--渲染表单的Item项-->
            <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">
              <!--复选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="item1" v-for="(item1,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" neme="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" neme="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="hanleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" neme="4">
            <!-- 富文本编辑器组件-->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!--图片预览对话框-->
    <el-dialog title="图片预览" :visible.sync="dialogVisible" width="50%">
      <img width="100%" :src="previewPath" alt />
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // tab和步骤条的绑定
      activeIndex: '0',
      // 添加商品的请求参数
      addForm: {
        // 表单数据项
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: {},
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      /// /添加商品的表单的验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      cateList: [],
      // 级联选择器要显示的对象
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTabData: [],
      // 静态参数列表数据
      onlyTabData: [],
      // 上传图片的URL地址
      uploadURL: 'http://39.98.222.117:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片地址
      previewPath: '',
      // 图片预览对话框的显示与隐藏
      dialogVisible: false
    }
  },

  created () {
    this.getCateList()
  },

  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.cateList = res.data
      //console.log(this.cateList)
    },
    // 监听级联选择器
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      //console.log(this.addForm)
    },
    // 切换标签之前的钩子
    beforeTabLeave (activeName, oldActiveName) {
      /* console.log('将要离开的标签'+oldActiveName)
      console.log('将要进入的标签'+activeName) */
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    /// tab 被选中时触发
    async tabClick () {
      // console.log(this.activeIndex)
      // 证明访问的是商品参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品参数失败')
        }
        // console.log(res)
        // 把 attr_vals 转换成数组
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTabData = res.data
        // console.log(this.manyTabData)
      }
      // 证明访问的是商品属性面板
      else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品属性失败')
        }
       // console.log(res.data)
        this.onlyTabData = res.data
       // console.log(this.onlyTabData)
      }
    },
    // 处理图片预览效果
    handlePreview (file) {
      //console.log(file)
      this.previewPath = file.response.data.url
      this.dialogVisible = true
    },

    // 处理移除图片的操作
    handleRemove (file) {
      //console.log(file)
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.用 findIndex 从 addForm.pics 数组中，找到对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      //console.log(i)
      // 3.调用数组的splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },

    // 监听图片上传成功的事件
    hanleSuccess (response) {
      //console.log(response)
      // 1.拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2.将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写完整基本信息')
        }
        // 执行添加的业务逻辑
        //console.log(this.addForm)
        this.addForm.goods_cat = this.addForm.goods_cat.join(',')

        /// 处理动态参数
        this.manyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        //console.log(this.addForm)

        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', this.addForm)
        //console.log(res)
        if (res.meta.status !== 201) { return this.$message.error('添加商品失败') }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },

  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 15px 0;
  font-size: 10px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.btnAdd {
  margin-top: 15px;
}
</style>
